ES2351011B1 - AUTOBLOCANT NUT WITH TIGHTENING TORQUE CONTROL TO FIX ELEMENTS TO A SUPPORT AND ITS USE. - Google Patents
AUTOBLOCANT NUT WITH TIGHTENING TORQUE CONTROL TO FIX ELEMENTS TO A SUPPORT AND ITS USE. Download PDFInfo
- Publication number
- ES2351011B1 ES2351011B1 ES200801571A ES200801571A ES2351011B1 ES 2351011 B1 ES2351011 B1 ES 2351011B1 ES 200801571 A ES200801571 A ES 200801571A ES 200801571 A ES200801571 A ES 200801571A ES 2351011 B1 ES2351011 B1 ES 2351011B1
- Authority
- ES
- Spain
- Prior art keywords
- self
- nut
- support
- locking nut
- locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000005036 nerve Anatomy 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/284—Locking by means of elastic deformation
- F16B39/286—Locking by means of elastic deformation caused by saw cuts
Abstract
Tuerca autoblocante con control de par de apriete para fijar elementos a un soporte y su uso. La tuerca autoblocante consiste en un cuerpo monopieza hueco provisto de un taladro axial pasante que comprende una tuerca autoblocante en un extremo que está provista de un corte transversal parcial, que fija el elemento a un soporte, una tuerca normal prevista en el extremo opuesto; y una porción cilíndrica intermedia que presenta un nervio anular de tope que sobresale circunferencialmente del contorno de ambas tuercas extremas opuestas y un estrangulamiento del par de apriete situado entre el nervio anular y la tuerca autoblocante en posición contigua a la tuerca autoblocante.Self-locking nut with torque control tighten to fix elements to a support and its use. The nut self-locking consists of a hollow single piece body provided with a axial through hole comprising a self-locking nut in a end that is provided with a partial cross section, which fixes the element to a support, a normal nut provided at the end opposite; and an intermediate cylindrical portion that has a nerve annular abutment protruding circumferentially from the contour of both opposite end nuts and a throttle of the pair of tighten located between the annular nerve and the self-locking nut in position adjacent to the self-locking nut.
Description
Tuerca autoblocante con control de par de apriete para fijar elementos a un soporte y su uso.Self-locking nut with torque control tighten to fix elements to a support and its use.
La presente invención tiene por objeto una tuerca autoblocante con control de par de apriete para fijar elementos a un soporte y su uso.The present invention aims at a self-locking nut with tightening torque control to fix elements to a support and its use.
En el campo de las fijaciones roscadas de propósito general, y en particular en el caso de las conexiones eléctricas de terminales, para conectar los terminales a los soportes correspondientes.In the field of threaded fasteners of general purpose, and in particular in the case of connections electrical terminals, to connect the terminals to the corresponding supports.
En las conexiones eléctricas de los terminales, se utilizan tuercas normalizadas para la fijación de los terminales al soporte correspondiente, que durante el tiempo de funcionamiento del terminal en cuestión, paulatinamente se van deteriorando hasta que se tienen que reemplazar antes de lo previsto.In the electrical connections of the terminals, standard nuts are used for fixing the terminals to the corresponding support, which during the operating time of the terminal in question, gradually deteriorate until They have to be replaced earlier than expected.
Asimismo, debido a pequeñas vibraciones no perceptibles, propias de los equipos eléctricos, el apriete de las tuercas normales se va aflojando y disminuye la presión de contacto de la tuerca.Also, due to small vibrations not noticeable, typical of electrical equipment, the tightening of the normal nuts loosen and decrease contact pressure of the nut.
Esto en general, se amortigua disponiendo distintos tipos de arandelas partidas, onduladas, etc., que impiden que el aflojamiento sea más o menos rápido.This in general is damped by arranging different types of split washers, wavy, etc., that prevent Let the loosening be more or less rapid.
Para subsanar dichas cuestiones se disponen en
muchos casos de tuercas normales contiguas, de las cuales la primera
tuerca aprieta y sujeta el terminal contra el soporte y la segunda
aprieta y sujeta la primera, con lo cual se disminuye el problema
plantea-
do.In order to correct these issues, in many cases normal adjacent nuts are provided, of which the first nut tightens and holds the terminal against the support and the second one tightens and fastens the first, which reduces the problem posed.
do.
La citada cuestión ha sido solucionada en parte mediante unas tuercas blocantes que están provistas de un corte transversal parcial que bloquea la acción de apriete de la tuerca.The aforementioned issue has been partially resolved by means of blocking nuts that are provided with a cut partial transverse that blocks the tightening action of the nut.
La propia solicitante es titular del Diseño Comunitario nº 209424-002, concedido, relativo a una tuerca blocante de este tipo.The applicant herself owns the Design Community No. 209424-002, granted, relating to a locking nut of this type.
Las tuercas blocantes citadas constituyen un gran avance en la estabilidad y duración de las tuercas para estas aplicaciones, pero todavía no está totalmente resuelta dicha problemática.The blocking nuts cited constitute a great advance in the stability and duration of the nuts for these applications, but still not fully resolved said problematic
En efecto, las citadas tuercas blocantes efectúan un apriete perfecto y duradero, siempre y cuando hayan sido ajustadas con el par de apriete suficiente para bloquear la tuerca.In effect, the aforementioned blocking nuts make a perfect and lasting tightening, as long as they have been adjusted with sufficient tightening torque to lock the nut.
La presente invención, elimina totalmente los problemas e inconvenientes mencionados y tiene por objeto una tuerca autoblocante con control de par de apriete para fijar elementos a un soporte y su uso, en la que la tuerca presenta una estructura que impide su desenroscado y proporciona una sujeción fija y permanente del elemento en cuestión al soporte correspondiente.The present invention totally eliminates problems and inconveniences mentioned and is intended for a nut self-locking with tightening torque control to fix elements to a support and its use, in which the nut has a structure that prevents unscrewing and provides a fixed and permanent support from the item in question to the corresponding support.
La tuerca autoblocante de la invención consiste en un cuerpo monopieza hueco provisto de un taladro axial pasante de doble diámetro que comprende una tuerca autoblocante en un extremo que fija el elemento a sujetar provisto de un orificio a un soporte provisto de un espárrago roscado; una tuerca normal prevista en el extremo opuesto; y una porción cilíndrica intermedia que presenta un nervio anular de tope que sobresale circunferencialmente del contorno de ambas tuercas extremas opuestas y un estrangulamiento para el control del par de apriete situado entre el nervio anular y la tuerca autoblocante en posición contigua a la tuerca autoblocante.The self-locking nut of the invention consists of in a hollow single piece body provided with an axial through hole of double diameter comprising a self-locking nut at one end which fixes the element to be fastened provided with a hole to a support provided with a threaded stud; a normal nut provided in the opposite end; and an intermediate cylindrical portion that has a annular butt nerve protruding circumferentially from the contour of both opposite end nuts and a throttle for the control of the tightening torque located between the annular nerve and the self-locking nut adjacent to the nut self-locking
Según la presente invención la tuerca autoblocante consiste en una tuerca normal provista de un corte transversal parcial de poco espesor que afecta la mayor parte de la sección de la tuerca incluyendo el taladro pasante del cuerpo monopieza correspondiente, cuyo corte proporciona a dicha tuerca un efecto autoblocante.According to the present invention the nut self-locking consists of a normal nut provided with a cut partial transverse thickness that affects most of the nut section including body through hole corresponding single piece, whose cut provides said nut a self-blocking effect
La tuerca autoblocante con control de par de apriete para fijar elementos a un soporte, según la invención es aplicable especialmente en conexiones de terminales eléctricos y similares.The self-locking nut with torque control tighten to fix elements to a support, according to the invention is especially applicable in electrical terminal connections and Similar.
La presente invención también tiene por objeto el uso de la citada tuerca autoblocante que comprende las fases de:The present invention also aims at the use of said self-locking nut comprising the phases from:
a) ensartar el espárrago roscado del soporte en el orificio del elemento a sujetar;a) thread the threaded stud of the bracket into the hole of the element to be fastened;
b) roscar la tuerca autoblocante en dicho espárrago aplicada sobre el elemento a sujetar, mediante la herramienta correspondiente aplicando el par de apriete en la tuerca normal en cuya acción el nervio anular de tope impide el paso de la herramienta de la tuerca normal a la fuerza autoblocante alojándose el extremo libre del espárrago en el taladro pasante del cuerpo monopieza;b) thread the self-locking nut on said stud applied to the element to be fastened, by means of the corresponding tool applying the tightening torque on the nut normal in whose action the annular butt nerve prevents the passage of the normal nut tool to self-locking force staying the free end of the stud in the through hole of the body single piece;
c) en el roscado de la tuerca, al alcanzar el par de apriete, se rompe por el plano de estrangulamiento contiguo a la tuerca autoblocante, la cual se mantiene en posición de fijación del elemento de soporte; yc) on the threading of the nut, upon reaching the tightening torque, is broken by the throttle plane adjacent to the self-locking nut, which is held in the locked position of the support element; Y
d) se retira la parte restante relativa a la tuerca normal y la porción cilíndrica intermedia con el nervio anular es retirada.d) the remaining part relative to the normal nut and intermediate cylindrical portion with the nerve Cancel is withdrawn.
Para recambiar el terminal se realiza la
liberación del elemento respecto al soporte aplicando la herramienta
a la tuerca autoblocante para su desenrosca-
do.To replace the terminal, the element is released from the support by applying the tool to the self-locking nut for unscrewing.
do.
Estas y otras características se desprenderán mejor de la descripción detallada que sigue, para facilitar la cual se acompaña de dos láminas de dibujos en la que se ha representado un caso práctico de realización que se cita solamente a titulo de ejemplo no limitativo del alcance de la presente invención.These and other features will come off better than the detailed description that follows, to facilitate which It is accompanied by two sheets of drawings in which it has been represented a practical case of realization that is cited only by way of non-limiting example of the scope of the present invention.
En dichos dibujos:In these drawings:
La figura 1 es una vista en perspectiva de la tuerca autoblocante objeto de la presente invención.Figure 1 is a perspective view of the self-locking nut object of the present invention.
La figura 2 es una vista en alzado de la tuerca autoblocante.Figure 2 is an elevation view of the nut self-locking
La figura 3 es una vista en sección longitudinal de la tuerca autoblocante, considerada por el plano III-III de la figura 2.Figure 3 is a longitudinal sectional view. of the self-locking nut, considered by the plane III-III of Figure 2.
La figura 4 es una vista en planta superior de la tuerca autoblocante.Figure 4 is a top plan view of the self-locking nut.
Las figuras 5A, 5B, 5C y 5D son sendas vistas en alzado lateral con el elemento o terminal y el soporte fragmentados, que muestran, respectivamente, las fases de uso relativas a:Figures 5A, 5B, 5C and 5D are paths seen in side elevation with the fragmented element or terminal and support, which show, respectively, the phases of use related to:
posicionado en forma explotada del soporte provisto de espárrago roscado, elemento o terminal provisto de orificios de paso y la tuerca autoblocante;positioned in exploited form of the support provided with threaded stud, element or terminal provided with through holes and self-locking nut;
ensartado del espárrago en el orificio del elemento;skewered the stud in the hole of the element;
roscado de la tuerca en el espárrago aplicada sobre el elemento;threaded nut on the stud applied about the element;
y rotura de la tuerca por el plano de estrangulamiento al alcanzar el par de apriete.and breakage of the nut by the plane of throttling when tightening torque is reached.
De conformidad con los dibujos, la tuerca autoblocante con control de par de apriete para fijar elementos a un soporte, objeto de la presente invención, con la referencia general (1), comprende una estructura que impide su desenroscado y proporciona una sujeción fija y permanente del elemento en cuestión al soporte correspondiente, cuya tuerca autoblocante (1) consiste en un cuerpo monopieza hueco (2), que está provisto de un taladro axial pasante (3) de doble diámetro, cuyo cuerpo monopieza (2) comprende una tuerca autoblocante (4) en un extremo, una tuerca normal (5) en el extremo opuesto, y una porción cilíndrica intermedia (6).In accordance with the drawings, the nut self-locking with tightening torque control to fix elements to a support, object of the present invention, with the general reference (1), comprises a structure that prevents its unscrewing and provides a fixed and permanent hold of the element in question to the corresponding support, whose self-locking nut (1) consists of a hollow single piece body (2), which is provided with an axial bore double diameter through (3) whose single piece body (2) comprises a self-locking nut (4) at one end, a normal nut (5) in the opposite end, and an intermediate cylindrical portion (6).
La tuerca autoblocante (4)- consiste en una tuerca normal provista de un corte transversal parcial (7) de poco espesor que afecta la mayor parte de la sección de la tuerca incluyendo el taladro pasante (3) del cuerpo monopieza (2) correspondiente del conjunto de tuerca autoblocante (1), -como ilustran las figuras, especialmente la sección de la figura 3-, cuyo corte proporciona a dicha tuerca (4) un efecto autoblocante.The self-locking nut (4) - consists of a normal nut provided with a partial cross section (7) of little thickness that affects most of the nut section including the through hole (3) of the single piece body (2) corresponding of the self-locking nut assembly (1), -like they illustrate the figures, especially the section of figure 3-, whose cutting provides said nut (4) with a self-locking effect.
La tuerca autoblocante (4), como se ilustra en las figuras 5A, 5B, 5C y 5D, fija el elemento (8) a sujetar a un soporte (9), cuyo elemento (8) a sujetar, tal como un terminal eléctrico, tienen un apéndice (10) que esta provisto de un orificio (11), y por su parte, el soporte 9 esta provisto de un espárrago (12).The self-locking nut (4), as illustrated in Figures 5A, 5B, 5C and 5D, fix the element (8) to be attached to a support (9), whose element (8) to hold, such as a terminal electrical, have an appendix (10) that is provided with a hole (11), and for its part, the support 9 is provided with a stud (12).
La tuerca normal (5) situada en el extremo opuesto a la tuerca autoblocante (4), permite la aplicación de la herramienta -no ilustrada- para efectuar el roscado del conjunto de tuerca al soporte (9).The normal nut (5) located at the end opposite the self-locking nut (4), allows the application of the tool -not illustrated- for threading the assembly of nut to support (9).
La porción cilíndrica intermedia (6) presenta un nervio anular (13) de tope, que sobresale circunferencialmente del contorno de ambas tuercas extremas opuestas (4), (5) y un estrangulamiento (14) del par de apriete, que está situado entre el nervio anular (13) y la tuerca autoblocante (4) en posición contigua a dicha tuerca autoblocante (4) (ver especialmente figuras 2 y 3), cuyo estrangulamiento (14) en la rotura del conjunto de tuerca define el plano de estrangulamiento (14a), como se describirá más adelante.The intermediate cylindrical portion (6) has a annular nerve (13) butt, protruding circumferentially from the contour of both opposite end nuts (4), (5) and a throttling (14) of the tightening torque, which is located between the annular nerve (13) and self-locking nut (4) in an adjacent position to said self-locking nut (4) (see especially figures 2 and 3), whose throttling (14) in the breakage of the nut assembly define the throttling plane (14a), as will be described more ahead.
La presente invención tiene también por objeto, el uso de la tuerca autoblocante con control de par de apriete para fijar elementos a un soporte descrita anteriormente, que comprende las fases de:The present invention also aims at, the use of the self-locking nut with torque control for fixing elements to a support described above, which comprises the phases of:
0) posicionar en forma explotada la tuerca autoblocante (1) de la invención, el apéndice (10) del elemento terminal (8) y el espárrago (12) del soporte (9), según se ilustra en la figura 5A;0) position the nut exploited self-locking (1) of the invention, the appendix (10) of the element terminal (8) and stud (12) of the support (9), as illustrated in figure 5A;
a) ensartar el espárrago roscado (12) del soporte (9) en el orificio (11) del apéndice (10) del elemento a sujetar (8), como se ilustra en la figura 5B;a) thread the threaded stud (12) of the support (9) in the hole (11) of the appendix (10) of the element a hold (8), as illustrated in Figure 5B;
b) roscar la tuerca autoblocante (1) de la invención en dicho espárrago (12) del soporte (9), aplicada sobre el apéndice (10) del elemento a sujetar (8), mediante la herramienta correspondiente -no ilustrada-, aplicando el par de apriete en la tuerca normal, según la flecha (F), como se ilustra en la figura 5C, en cuya acción el nervio anular (13) de tope impide el paso de la herramienta desde la tuerca normal (5) a la tuerca autoblocante (4), en cuyo roscado de la tuerca (1) el extremo libre del espárrago (12) se aloja y queda oculto en el taladro pasante (3) del cuerpo monopieza (2) de la tuerca autoblocante (1) (figura 5C);b) thread the self-locking nut (1) of the invention in said stud (12) of the support (9), applied on the appendix (10) of the element to be held (8), using the tool corresponding -not illustrated-, applying the tightening torque on the normal nut, according to arrow (F), as illustrated in Figure 5C, in which action the annular nerve (13) of stop stops the passage of the tool from the normal nut (5) to the self-locking nut (4), in whose threading of the nut (1) the free end of the stud (12) it is housed and hidden in the through hole (3) of the body single piece (2) of the self-locking nut (1) (figure 5C);
c) en el roscado (flecha F) de la tuerca autoblocante (1) de la invención, al alcanzar el par de apriete predeterminado, se rompe la tuerca por el plano de estrangulamiento (14a) contiguo a la tuerca autoblocante (4), la cual se mantiene en posición de fijación del elemento (8) al soporte (9), como ilustra la figura 5A; yc) on the thread (arrow F) of the nut self-locking (1) of the invention, upon reaching the tightening torque default, the nut is broken by the throttle plane (14a) adjacent to the self-locking nut (4), which is kept in fixing position of the element (8) to the support (9), as illustrated Figure 5A; Y
d) se retira la parte restante relativa a la tuerca normal (5) y la porción cilíndrica intermedia (6) con el nervio anular (13), como ilustra dicha figura 5D.d) the remaining part relative to the normal nut (5) and the intermediate cylindrical portion (6) with the annular nerve (13), as illustrated in Figure 5D.
En el uso de la tuerca autoblocante de la invención, cuando se tiene que cambiar, reemplazar, etc. la fijación descrita, se efectúa la liberación del elemento (8) respecto al soporte (9) aplicando la herramienta a la tuerca autoblocante (4) con una tuerca opuesta a la (F) para realizar su desenroscado.In the use of the self-locking nut of the invention, when it has to be changed, replaced, etc. fixing described, the element (8) is released with respect to the support (9) applying the tool to the self-locking nut (4) with a nut opposite (F) to unscrew it.
Cabe señalar que tanto la tuerca autoblocante de la invención descrita como el uso de la misma, son aplicables especialmente en conexiones de terminales eléctricos y similares.It should be noted that both the self-locking nut of The invention described as the use thereof, are applicable especially in electrical terminal connections and Similar.
La invención, dentro de su esencialidad, puede ser llevada a la práctica en otras formas de realización que difieran solo en detalle de la indicada únicamente a titulo de ejemplo, a las cuales alcanzará igualmente la protección que se recaba. Podrá, pues, fabricarse esta tuerca autoblocante con control de par de apriete para fijar elementos a un soporte en cualquier forma y tamaño, con los medios y materiales más adecuados y con los accesorios más convenientes, pudiendo los elementos componentes ser sustituidos por otros técnicamente equivalentes, por quedar todo ello comprendido dentro del espíritu de las reivindicaciones.The invention, within its essentiality, can be put into practice in other embodiments that differ only in detail from that indicated solely by way of example, which will also achieve the protection that collect. This self-locking nut can be manufactured with control of tightening torque to fix elements to a support in any shape and size, with the most appropriate media and materials and with the more convenient accessories, the component elements being able to be replaced by other technically equivalent ones, because everything remains this included within the spirit of the claims.
Claims (5)
yc) in the threading of the nut assembly (1) upon reaching the tightening torque, the nut assembly (1) is broken by the throttle plane (14a) adjacent to the self-locking nut (4), which is held in fixation position of the element (8) to the support (9);
Y
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200801571A ES2351011B1 (en) | 2008-05-27 | 2008-05-27 | AUTOBLOCANT NUT WITH TIGHTENING TORQUE CONTROL TO FIX ELEMENTS TO A SUPPORT AND ITS USE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200801571A ES2351011B1 (en) | 2008-05-27 | 2008-05-27 | AUTOBLOCANT NUT WITH TIGHTENING TORQUE CONTROL TO FIX ELEMENTS TO A SUPPORT AND ITS USE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2351011A1 ES2351011A1 (en) | 2011-01-31 |
| ES2351011B1 true ES2351011B1 (en) | 2011-09-22 |
Family
ID=43477815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200801571A Active ES2351011B1 (en) | 2008-05-27 | 2008-05-27 | AUTOBLOCANT NUT WITH TIGHTENING TORQUE CONTROL TO FIX ELEMENTS TO A SUPPORT AND ITS USE. |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2351011B1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1449683A (en) * | 1921-08-06 | 1923-03-27 | William E Lippold | Nut lock |
| NL225368A (en) * | 1957-02-28 | |||
| GB854792A (en) * | 1958-07-29 | 1960-11-23 | A P Newall & Company Ltd | Improvements relating to screw nuts |
| US3444775A (en) * | 1968-02-16 | 1969-05-20 | Lockheed Aircraft Corp | Nut formed with multiple torque-off collars |
| US3512447A (en) * | 1968-09-09 | 1970-05-19 | Rudolph Marion Vaughn | Frangible nut fastener |
| US3742583A (en) * | 1972-01-14 | 1973-07-03 | Standard Pressed Steel Co | Method of using twist-off nut to assemble a joint |
| DE2757542C2 (en) * | 1977-12-23 | 1984-06-07 | Ernst Hoffmann KG Schilderfabrik-Gravieranstalt, 5900 Siegen | Sign attachment to a carrier |
-
2008
- 2008-05-27 ES ES200801571A patent/ES2351011B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| ES2351011A1 (en) | 2011-01-31 |
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